One place says this has a Z690 motherboard, another says it has Z790 which one is correct?

It's the Z790 UD AC (U3E1) motherboard by Gigabyte.

Does this system have Audio built in or will I need to get an Audio card also?

It has a Gigabyte mobo. According to their website: 1. Realtek® audio codec 2. High Definition Audio 3. 2/4/5.1/7.1-channel * You can change the functionality of an audio jack using the audio software. To configure 7.1-channel audio, access the audio software for audio settings. 4. Support for S/PDIF Out

Questions & Answers: ABS Eurus Aqua Gaming PC – Windows 11 - Intel i9 14900KS – GeForce RTX 4090 – DLSS 3.5 - AI-Powered Performance - 64GB DDR5 6000MHz - 2TB M.2 NVMe SSD

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ABS Eurus Aqua Gaming PC – Windows 11 - Intel i9 14900KS – GeForce RTX 4090 – DLSS 3.5 - AI-Powered Performance - 64GB DDR5 6000MHz - 2TB M.2 NVMe SSD – EA14900KS4090

Operating System: Windows 11 Home
CPU: Intel Core i9 14900KS 8 P-Core, 16 E-Core, 32-Thread Processor
GPU: Gigabyte RTX 4090 Windforce V2 with support for DLSS 3.5 - AI-Powered Performance
Motherboard: Gigabyte Z790 UD-AC DDR5
RAM: TeamGroup Delta RGB 64GB DDR5 6000 MHz (2x32GB)
SSD: Kingston 2TB M.2 NVMe SSD
CPU Cooler: EKWB RGB 360MM AIO Liquid Cooler
PSU: ABS ATX 1000W 80+ Gold
Case: ABS Eurus H570 Obsidian Black
Dimension: 487 x 216 x 463.6 mm
Wi-Fi: Wi-Fi 5
Bluetooth: Bluetooth 4.2
VR Ready: Yes

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